From 1f3c7d968c4313dbb71bc93306556cc9292d06ef Mon Sep 17 00:00:00 2001
From: Ian Romanick <ian.d.romanick@intel.com>
Date: Wed, 1 Sep 2010 21:23:52 -0700
Subject: glsl2: Implement noise[1234] built-in functions using ir_unop_noise

---
 src/glsl/builtins/ir/noise2 | 75 +++++++++++++++++++++++++++++++++++----------
 1 file changed, 59 insertions(+), 16 deletions(-)

(limited to 'src/glsl/builtins/ir/noise2')

diff --git a/src/glsl/builtins/ir/noise2 b/src/glsl/builtins/ir/noise2
index ae4443a704..008f8b00f1 100644
--- a/src/glsl/builtins/ir/noise2
+++ b/src/glsl/builtins/ir/noise2
@@ -1,18 +1,61 @@
 ((function noise2
-   (signature vec2
-     (parameters
-       (declare (in) float x))
-     ((return (constant vec2 (0 0)))))
-   (signature vec2
-     (parameters
-       (declare (in) vec2 x))
-     ((return (constant vec2 (0 0)))))
-   (signature vec2
-     (parameters
-       (declare (in) vec3 x))
-     ((return (constant vec2 (0 0)))))
-   (signature vec2
-     (parameters
-       (declare (in) vec4 x))
-     ((return (constant vec2 (0 0)))))
+  (signature vec2
+    (parameters (declare (in) vec4 p))
+    (
+      (declare () float a)
+      (declare () float b)
+      (declare () vec2 t)
+
+      (assign (constant bool (1)) (x) (var_ref a) (expression float noise (var_ref p)))
+      (assign (constant bool (1)) (x) (var_ref b) (expression float noise (expression vec4 + (var_ref p) (constant vec4 (601.0 313.0 29.0 277.0)))))
+      (assign (constant bool (1)) (x) (var_ref t) (swiz xx (var_ref a)))
+      (assign (constant bool (1)) (y) (var_ref t) (swiz xx (var_ref b)))
+      (return (var_ref t))
+    ))
+
+  (signature vec2
+    (parameters (declare (in) vec3 p))
+    (
+      (declare () float a)
+      (declare () float b)
+      (declare () vec2 t)
+
+      (assign (constant bool (1)) (x) (var_ref a) (expression float noise (var_ref p)))
+      (assign (constant bool (1)) (x) (var_ref b) (expression float noise (expression vec3 + (var_ref p) (constant vec3 (601.0 313.0 29.0)))))
+      (assign (constant bool (1)) (x) (var_ref t) (swiz xx (var_ref a)))
+      (assign (constant bool (1)) (y) (var_ref t) (swiz xx (var_ref b)))
+      (return (var_ref t))
+    ))
+
+  (signature vec2
+    (parameters
+      (declare (in ) vec2 p)
+    )
+    (
+      (declare () float a)
+      (declare () float b)
+      (declare () vec2 t)
+
+      (assign (constant bool (1)) (x) (var_ref a) (expression float noise (var_ref p)))
+      (assign (constant bool (1)) (x) (var_ref b) (expression float noise (expression vec2 + (var_ref p) (constant vec2 (601.0 313.0)))))
+      (assign (constant bool (1)) (x) (var_ref t) (swiz xx (var_ref a)))
+      (assign (constant bool (1)) (y) (var_ref t) (swiz xx (var_ref b)))
+      (return (var_ref t))
+    ))
+
+  (signature vec2
+    (parameters
+      (declare (in ) float p)
+    )
+    (
+      (declare () float a)
+      (declare () float b)
+      (declare () vec2 t)
+
+      (assign (constant bool (1)) (x) (var_ref a) (expression float noise (var_ref p)))
+      (assign (constant bool (1)) (x) (var_ref b) (expression float noise (expression float + (var_ref p) (constant float (601.0)))))
+      (assign (constant bool (1)) (x) (var_ref t) (swiz xx (var_ref a)))
+      (assign (constant bool (1)) (y) (var_ref t) (swiz xx (var_ref b)))
+      (return (var_ref t))
+    ))
 ))
-- 
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